how to fix the P0171 code in my BMW X5 G05 (2019-2024)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.

2. Inspect and Repair Air Intake System

• Tools Required: Visual inspection tools, flashlight.
• Inspect all vacuum hoses and connections for cracks or disconnections.
• If any leaks are found, replace damaged hoses or reconnect loose fittings.

3. Clean MAF Sensor

• Tools Required: MAF cleaner spray, soft cloth.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF cleaner on the sensor elements, avoiding contact with the wiring.
• Allow it to dry completely before reinstalling.

4. Check and Replace Fuel Components

• Tools Required: Fuel pressure gauge, socket set.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position (do not start the engine) and check the pressure. It should be within manufacturer specifications.
• If pressure is low, replace the fuel pump and/or fuel filter as needed.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit or replacement injectors.
• Remove the fuel rail and inspect each injector for clogs or leaks.
• Clean or replace any faulty injectors.

6. Verify Throttle Body Operation

• Tools Required: Throttle body cleaner, socket set.
• Remove the throttle body and clean it thoroughly using throttle body cleaner.
• Reinstall the throttle body and ensure all connections are secure.